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[Bug target/20126] [3.3/3.4/4.0 Regression] Inlined memcmp makes one argument null on entry
- From: "rearnsha at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 16 Apr 2005 17:50:51 -0000
- Subject: [Bug target/20126] [3.3/3.4/4.0 Regression] Inlined memcmp makes one argument null on entry
- References: <20050221214433.20126.jkohen@users.sourceforge.net>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From rearnsha at gcc dot gnu dot org 2005-04-16 17:50 -------
(In reply to comment #41)
> Subject: Re: [PR target/20126, RFC] loop DEST_ADDR biv replacement may fail
> Sure. Your patch in comment #28 of bugzilla PR20126 is OK for mainline
> to resolve Josh's bootstrap failure. Sounds like you've already done
> the necessary testing, and I'll trust you on a suitable ChangeLog entry.
>
I'm not convinced.
1) It produces non-canonical RTL: (MINUS (REG) (const))
2) It doesn't validate that insn, which is necessary in case 'const' or some
modified version of it is not valid.
R.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20126